In 2012, the Celtics and Pacers were on a 50 win pace and the Thunder were on a 60 win pace in the lockout season. LeBron has also beaten a 73 win team in the Finals.
At the end of the this is semantics. I don't know about Mr. Playoffs. I do know LeBron is a pretty dominant postseason player throughout his career through his wins and losses. At the end of the day you have to play whose in front of you. I can tell you those series against the Pacers and Celtics weren't cakewalks especially due to circumstances. A lot of players would have folded.
The only teams in the West that could have possibly eliminated LeBron in that late 00's time period are the Spurs and Lakers. The Nuggets, Jazz, Suns these are treadmill teams that scored a lot of points and won regular season games. The Nuggets and Suns weren't even good defensive teams. You need an elite defense to beat a LeBron led team.
Playoff LeBron is a thing because of things like his early duels and game winners against Gilbert Arenas and the Wizards, taking a 64 win Detroit team to 7 games at 21 years old, game 5 against Detroit on the road in '07 scoring the last 25 in a 2OT win, game 7 duel against Paul Pierce in '08 against a highly favored Celtics team, his entire '09 playoff run where he averaged like 38/9/9 and dropped that game winner on the Magic, the back against the wall performances against Boston (45/15/5) and Indiana (40/18/9) on the road with his supporting cast injured against historically good defenses, leading the comeback in the 2013 Finals against the Spurs scoring 16 in the 4th then putting up a dominant game 37 point game 7 and hitting the dagger in the closing minute, taking the Warriors to 6 games by himself in 2015, owning Toronto's soul, leading the 2016 Finals in every statistical category and coming back down from 3-1 against a 73-9 team, dropping 51 in a Finals game...
